If the streams in Problem 15.22 have the following film heat transfer coefficients, estimate the optimum minimum approach temperature for this problem.

Problem 15.22

Six streams in a chemical process need to be heated or cooled. The thermal data for these streams are given in the following table:

• Calculate the minimum hot and cold utility loads for this process subject to a minimum approach temperature of 20°F.
• Calculate the pinch temperatures for this process. You may assume that there is only one hot and one cold utility available.
• Calculate the minimum number of exchangers needed for the minimum energy case for above and below the pinch.
• Design the MUMNE network for the process.

Transcribed Image Text:

h₁ = 75 BTU/hr/ft²°F h₂= 25 BTU/hr/ft²°F h3 = 10 BTU/hr/ft²°F h4 45 BTU/hr/ft²°F h5 = 30 BTU/hr/ft2°F h6 30 BTU/hr/ft²°F =